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Finding the Fourth Proportional to 39,390.87, 59,086.28 and 11,688.87

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Solution

The fourth proportional to 39,390.87, 59,086.28 and 11,688.87 is: 17,533.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,390.87 : 59,086.28 = 11,688.87 : x
  2. Step 2: Convert to fraction form
    39,390.87/59,086.28 = 11,688.87/x
  3. Step 3: Cross multiply
    39,390.87x = 59,086.28 × 11,688.87
  4. Step 4: Simplify right side
    39,390.87x = 690,651,787.26
  5. Step 5: Solve for x
    x = 690,651,787.26/39,390.87
  6. Step 6: Final answer
    x = 17,533.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.